[OPEN-EXTJSIV-157] Ext.draw.Component viewbox issue

[4CastRisk]

Trying to write a component window that has a draw surface inside it:

Ext.define 'Quartermaster.components.chart.Window',
    extend: 'Ext.window.Window'
    alias: 'Quartermaster.CustomChart'

    initComponent: ->
        Ext.apply @,
            layout: 'fit'
            title: 'Chart Window'
            iconCls: 'icon-application'
            width: 960
            height: 400
            plain: yes
            closeAction: 'hide'
            center: yes
            maximizable: yes
            minimizable: no # This will change in future releases
            collapsible: yes
            items: [
                Ext.create 'Ext.draw.Component', {scope: @}
            ]
            
        @callParent arguments

Throws an error in firefox:

Unexpected value Infinity Infinity -Infinity -Infinity parsing viewBox attribute.

SVG generated looks like this:

<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="948" height="366" id="ext-gen1171" viewBox="Infinity Infinity -Infinity -Infinity" style="width: 948px; height: 366px;"><defs/><rect width="100%" height="100%" fill="#000" stroke="none" opacity="0" id="ext-gen1172"/></svg>

[Jamie Avins]

Thank you for the report, we'll put some bounds checking on that.